How to declare function with the same call signature as another?

[ketmar via Digitalmars-d-learn]

On Wednesday, 23 November 2016 at 22:28:57 UTC, Tofu Ninja wrote:
> On Wednesday, 23 November 2016 at 22:19:28 UTC, ketmar wrote:
>> On Wednesday, 23 November 2016 at 22:14:25 UTC, Tofu Ninja 
>> wrote:
>>> What is a (ref int)? A tuple with "ref int" as its only 
>>> member? Since when is ref int a type?
>>
>> it is "type with modifier", like "const int" or "immutable 
>> int".
>
> Since when has ref been a type qualifier? It has always been a 
> parameter/function attribute.

which is technically type qualifier. it just forbidden (in 
grammar) to use it anywhere except arg declaration.